fix: create deep copy of file passed into tree

Ben Schlegel

2023-09-16 fea352849c6972da4b3b8935eb2e86f6cefc76ed

 quartz/plugins/transformers/links.ts

@@ -72,6 +72,7 @@
                    simplifySlug(destCanonical as FullSlug),
                  ) as SimpleSlug
                  outgoing.add(simple)
                  node.properties["data-slug"] = simple
                }

                // rewrite link internals if prettylinks is on